Fluid temperature compensation in a hot wire anemometer using a single sensor

Author

Ferreira, Rômulo P C ; Freire, Raimundo C S ; Deep, Gurdip S. ; Neto, J. S Rocha ; Oliveira, Amauri

Author_Institution

CEFET-AL, Brazil

Volume

1

fYear

2000

fDate

2000

Firstpage

512

Abstract

In conventional constant temperature hot-wire anemometer, the compensation for the fluid temperature is done by using two sensors. In this paper, the analysis of a anemometer using only one sensor, operating alternately at two different temperatures is presented. The effect of the amplifier input offset voltage is taken into account, and its influence on the measurement of fluid velocity is quantified. Preliminary experimental results are also presented

Keywords

anemometers; bridge circuits; compensation; operational amplifiers; amplifier input offset voltage effect; bridge resistors; circuit configuration; electrical equivalence; fluid temperature compensation; fluid velocity measurement; hot wire anemometer; op amp limitations; single sensor; thermodynamic equilibrium balance; thermoresistive sensor; Circuits; Fluid flow measurement; Operational amplifiers; Resistance heating; Temperature sensors; Thermal sensors; Thermoresistivity; Velocity measurement; Voltage; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2000. IMTC 2000. Proceedings of the 17th IEEE

Conference_Location

Baltimore, MD

ISSN

1091-5281

Print_ISBN

0-7803-5890-2

Type

conf

DOI

10.1109/IMTC.2000.846918

Filename

846918